CN105821693A - Method for preparing enzyme modified environment-friendly pulp - Google Patents
Method for preparing enzyme modified environment-friendly pulp Download PDFInfo
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- CN105821693A CN105821693A CN201610401614.XA CN201610401614A CN105821693A CN 105821693 A CN105821693 A CN 105821693A CN 201610401614 A CN201610401614 A CN 201610401614A CN 105821693 A CN105821693 A CN 105821693A
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- Prior art keywords
- fiber
- paper pulp
- solution
- raw material
- chopped fiber
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- Paper (AREA)
Abstract
The invention discloses a method for preparing enzyme modified environment-friendly pulp. Raw materials are low in price, no chemical reagent needs to be added, energy consumption is low, little time is needed, negative effects on the environment are small in the preparation process, and the pulp raw materials and groups of a cross-linking agent react and bond. An enzymatic hydrolysis method is adopted, pulp fibers are subjected to surface modification, colloid, xylan and hemicelluloses components in the pulp fibers are removed, the content of crystalline cellulose is increased, and therefore the mechanical strength of a composite is improved.
Description
Technical field
The present invention relates to pulp technology for making paper, be specifically related to the preparation method of a kind of enzyme modification environment-friendly paper pulp.
Background technology
The timber resources of China extremely lacks, and paper making raw material bottleneck is particularly thorny.The yield (the slurry oven-dry weight that ovendriedwood per ton can be prepared) of paper pulp raw material material is high, and pulping waste liquor pollutes and is easily handled less, meets the development need of green technology for making paper.But due to the intensity difference of paper pulp raw material, reduce the quality of paper, thus limit its a large amount of uses in papermaking.Existing technology is to improve the intensity of slurry by adding starch in the slurry, but in such method, the retention rate of starch is relatively low, have impact on the lifting of pulp strength.
At present, native cellulose is that nature contains the abundantest high molecular polymer, is prevalent in the natural plants such as wood, bamboo, cotton, fiber crops, its abundance, cheap, and has biological degradability and recyclability.Along with enhancing and the development of nanotechnology of environmental protection ideas, people begin to focus on and prepare nano-cellulose from natural fiber.
Additive for paper making is the biggest on the impact of paper quality.Generally additive for paper making does not contains fiber, but the paper toughness produced is inadequate, and paper is more crisp, is easily broken off.A kind of additive for paper making improving paper toughness it is badly in need of, by increasing capacitance it is possible to increase the toughness of paper, it is possible to extend the shelf-life of paper products on market.
Zymotechnic has a wide range of applications in the industry such as food, textile and paper, its main cause be zymotechnic be eco-friendly, meanwhile, zymotechnic has the strongest selectivity, and they only specific reactions of catalysis, without removing or damage other molecules.In addition, the advantage of zymotechnic also has reduced cost, saves the energy and with water, improves properties of product etc..
Summary of the invention
The present invention provides the preparation method of a kind of enzyme modification environment-friendly paper pulp, uses paper pulp prepared by the method, and cost of material is cheap, this paper pulp the good mechanical property prepared.
To achieve these goals, the present invention provides the preparation method of a kind of enzyme modification environment-friendly paper pulp, and the method comprises the steps:
(1) degummed ramie fiber is utilized to extract paper pulp raw material
Degummed ramie fiber pulverizer is ground into 30-80 mesh chopped fiber, chopped fiber is put into equilibrium water conten in the container with sealing ring, measure the regain of chopped fiber；Weigh chopped fiber quality, calculate its fiber dry weight according to regain；In chopped fiber, add distilled water, make the abundant moistening of cellulose by distilled water immersion；Wherein, adding distilled water and make cellulose solids mass percent concentration in distilled water be 3%-5% in chopped fiber, the distilled water immersion time is 20-40h；
Stir chopped fiber with beater, make cellulose paste；Being put into by prepared slurry in ultra tiny refiner, there are gap and groove in the rotor of ultra tiny refiner and stator disk surface, set spacing between rotor and stator disk, make slurry pass through the gap between ultra tiny refiner grinding stone；The rotating speed of regulation grinding stone, move in circles grinding, and the hydrogen bond between microfibril is cut off in the high speed shear effect that grinding stone grinds, so that the fibrillation fiber of nanoscale is separated, finally obtains stable paper pulp raw material；Wherein, beater mixing speed is 800-1000rpm, and mixing time is 20-40min, sets and spaces for-50--100 μ rn between ultra tiny refiner rotor and stator disk, and the rotating speed of grinding stone is 1500-2000rpm；It is 40-60 time that number of times is ground in circulation repeatedly, and milling time is 3-5h；
(2) paper pulp raw material solution and compound enzyme are mixed, obtain mixed solution one；With the pH value of buffer solution regulation mixed solution one to 4-5, obtain mixed solution two；In wherein said paper pulp raw material solution, paper pulp fiber is 1:15-1:20 with the mass ratio of water, before described paper pulp raw material solution and compound enzyme mixing, comprises the steps of and paper pulp fiber is soaked in water 1-2h by described；Described buffer solution is citric acid-sodium citrate buffer or NaAc_HAc buffer solution；
(3) described mixed solution two is reacted at 45-50 DEG C 2-5h, before described mixed solution two reacts at 45-50 DEG C, comprise the steps of in described mixed solution two drip disodiumedetate (EDETATE SODIUM) aqueous solution to prevent the formation of metal-enzyme coordination compound, the molar concentration of described disodium ethylene diamine tetra-acetic acid aqueous solution is preferably 1mol/L-2mol/L；
(4) reactant liquor after reaction being terminated carries out the operation of enzyme denaturing, obtains product.
The preparation method of enzyme modification environment-friendly paper pulp of the present invention, low in raw material price, it is not necessary to adding chemical reagent, energy consumption is little, required time is less, preparation process is less to environment negative effect, and paper pulp raw material is bonded with the radical reaction of cross-linking agent, the method using enzyme hydrolysis, paper pulp fiber is carried out surface modification, remove colloid, xylan and the hemi-cellulose components in paper pulp fiber, improve the content of crystalline cellulose, thus improve the mechanical strength of composite.
Detailed description of the invention
Embodiment one
Degummed ramie fiber pulverizer is ground into 30-80 mesh chopped fiber, chopped fiber is put into equilibrium water conten in the container with sealing ring, measure the regain of chopped fiber；Weigh chopped fiber quality, calculate its fiber dry weight according to regain；In chopped fiber, add distilled water, make the abundant moistening of cellulose by distilled water immersion；Wherein, adding distilled water and make cellulose solids mass percent concentration in distilled water be 3% in chopped fiber, the distilled water immersion time is 20h.
Stir chopped fiber with beater, make cellulose paste；Being put into by prepared slurry in ultra tiny refiner, there are gap and groove in the rotor of ultra tiny refiner and stator disk surface, set spacing between rotor and stator disk, make slurry pass through the gap between ultra tiny refiner grinding stone；The rotating speed of regulation grinding stone, move in circles grinding, and the hydrogen bond between microfibril is cut off in the high speed shear effect that grinding stone grinds, so that the fibrillation fiber of nanoscale is separated, finally obtains stable paper pulp raw material；Wherein, beater mixing speed is 800rpm, and mixing time is 20min, sets and spaces for-50 μ rn between ultra tiny refiner rotor and stator disk, and the rotating speed of grinding stone is 1500rpm；It is 40 times that number of times is ground in circulation repeatedly, and milling time is 3h.
Paper pulp raw material solution and compound enzyme are mixed, obtains mixed solution one；With the pH value of buffer solution regulation mixed solution one to 4-5, obtain mixed solution two；In wherein said paper pulp raw material solution, paper pulp fiber is 1:15 with the mass ratio of water, before described paper pulp raw material solution and compound enzyme mixing, comprises the steps of and paper pulp fiber is soaked in water 1h by described；Described buffer solution is citric acid-sodium citrate buffer or NaAc_HAc buffer solution.
Described mixed solution two is reacted at 45 DEG C 2h, before described mixed solution two reacts at 45 DEG C, comprise the steps of in described mixed solution two drip disodiumedetate (EDETATE SODIUM) aqueous solution to prevent the formation of metal-enzyme coordination compound, the molar concentration of described disodium ethylene diamine tetra-acetic acid aqueous solution is preferably 1mol/L；Reactant liquor after reaction being terminated carries out the operation of enzyme denaturing, obtains product.
Embodiment two
Degummed ramie fiber pulverizer is ground into 30-80 mesh chopped fiber, chopped fiber is put into equilibrium water conten in the container with sealing ring, measure the regain of chopped fiber；Weigh chopped fiber quality, calculate its fiber dry weight according to regain；In chopped fiber, add distilled water, make the abundant moistening of cellulose by distilled water immersion；Wherein, adding distilled water and make cellulose solids mass percent concentration in distilled water be 5% in chopped fiber, the distilled water immersion time is 40h.
Stir chopped fiber with beater, make cellulose paste；Being put into by prepared slurry in ultra tiny refiner, there are gap and groove in the rotor of ultra tiny refiner and stator disk surface, set spacing between rotor and stator disk, make slurry pass through the gap between ultra tiny refiner grinding stone；The rotating speed of regulation grinding stone, move in circles grinding, and the hydrogen bond between microfibril is cut off in the high speed shear effect that grinding stone grinds, so that the fibrillation fiber of nanoscale is separated, finally obtains stable paper pulp raw material；Wherein, beater mixing speed is 1000rpm, and mixing time is 40min, sets and spaces for-100 μ rn between ultra tiny refiner rotor and stator disk, and the rotating speed of grinding stone is 2000rpm；It is 60 times that number of times is ground in circulation repeatedly, and milling time is 5h.
Paper pulp raw material solution and compound enzyme are mixed, obtains mixed solution one；With the pH value of buffer solution regulation mixed solution one to 4-5, obtain mixed solution two；In wherein said paper pulp raw material solution, paper pulp fiber is 1:20 with the mass ratio of water, before described paper pulp raw material solution and compound enzyme mixing, comprises the steps of and paper pulp fiber is soaked in water 2h by described；Described buffer solution is citric acid-sodium citrate buffer or NaAc_HAc buffer solution.
Described mixed solution two is reacted at 50 DEG C 5h, before described mixed solution two reacts at 50 DEG C, comprise the steps of in described mixed solution two drip disodiumedetate (EDETATE SODIUM) aqueous solution to prevent the formation of metal-enzyme coordination compound, the molar concentration of described disodium ethylene diamine tetra-acetic acid aqueous solution is preferably 2mol/L；Reactant liquor after reaction being terminated carries out the operation of enzyme denaturing, obtains product.
Describing the present invention the most by way of example, but the invention is not restricted to above-mentioned specific embodiment, all any change or modification done based on the present invention belong to the scope of protection of present invention.
Claims (1)
1. a preparation method for enzyme modification environment-friendly paper pulp, the method comprises the steps:
(1) degummed ramie fiber is utilized to extract paper pulp raw material
Degummed ramie fiber pulverizer is ground into 30-80 mesh chopped fiber, chopped fiber is put into equilibrium water conten in the container with sealing ring, measure the regain of chopped fiber；Weigh chopped fiber quality, calculate its fiber dry weight according to regain；In chopped fiber, add distilled water, make the abundant moistening of cellulose by distilled water immersion；Wherein, adding distilled water and make cellulose solids mass percent concentration in distilled water be 3%-5% in chopped fiber, the distilled water immersion time is 20-40h；
Stir chopped fiber with beater, make cellulose paste；Being put into by prepared slurry in ultra tiny refiner, there are gap and groove in the rotor of ultra tiny refiner and stator disk surface, set spacing between rotor and stator disk, make slurry pass through the gap between ultra tiny refiner grinding stone；The rotating speed of regulation grinding stone, move in circles grinding, and the hydrogen bond between microfibril is cut off in the high speed shear effect that grinding stone grinds, so that the fibrillation fiber of nanoscale is separated, finally obtains stable paper pulp raw material；Wherein, beater mixing speed is 800-1000rpm, and mixing time is 20-40min, sets and spaces for-50--100 μ rn between ultra tiny refiner rotor and stator disk, and the rotating speed of grinding stone is 1500-2000rpm；It is 40-60 time that number of times is ground in circulation repeatedly, and milling time is 3-5h；
(2) paper pulp raw material solution and compound enzyme are mixed, obtain mixed solution one；With the pH value of buffer solution regulation mixed solution one to 4-5, obtain mixed solution two；In wherein said paper pulp raw material solution, paper pulp fiber is 1:15-1:20 with the mass ratio of water, before described paper pulp raw material solution and compound enzyme mixing, comprises the steps of and paper pulp fiber is soaked in water 1-2h by described；Described buffer solution is citric acid-sodium citrate buffer or NaAc_HAc buffer solution；
(3) described mixed solution two is reacted at 45-50 DEG C 2-5h, before described mixed solution two reacts at 45-50 DEG C, comprise the steps of in described mixed solution two drip disodiumedetate (EDETATE SODIUM) aqueous solution to prevent the formation of metal-enzyme coordination compound, the molar concentration of described disodium ethylene diamine tetra-acetic acid aqueous solution is preferably 1mol/L-2mol/L；
(4) reactant liquor after reaction being terminated carries out the operation of enzyme denaturing, obtains product.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610401614.XA CN105821693A (en) | 2016-06-11 | 2016-06-11 | Method for preparing enzyme modified environment-friendly pulp |
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| CN201610401614.XA CN105821693A (en) | 2016-06-11 | 2016-06-11 | Method for preparing enzyme modified environment-friendly pulp |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1814911A (en) * | 2006-02-28 | 2006-08-09 | 山东轻工业学院 | Swlfate wood-pulp enzyme-method modifying process |
| CN101321908A (en) * | 2005-12-02 | 2008-12-10 | 阿克佐诺贝尔股份有限公司 | Process of producing high-yield pulp |
| CN103898789A (en) * | 2012-12-27 | 2014-07-02 | 东莞市绿微康生物科技有限公司 | Bio enzyme preparation for improvement of paper forming strength of alkaline peroxide mechanical pulp (APMP) and application thereof |
| CN104963206A (en) * | 2014-12-11 | 2015-10-07 | 华东理工常熟研究院有限公司 | Enzyme modified paper pulp fiber, wood-plastic composite material and preparation method thereof |
-
2016
- 2016-06-11 CN CN201610401614.XA patent/CN105821693A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101321908A (en) * | 2005-12-02 | 2008-12-10 | 阿克佐诺贝尔股份有限公司 | Process of producing high-yield pulp |
| CN1814911A (en) * | 2006-02-28 | 2006-08-09 | 山东轻工业学院 | Swlfate wood-pulp enzyme-method modifying process |
| CN103898789A (en) * | 2012-12-27 | 2014-07-02 | 东莞市绿微康生物科技有限公司 | Bio enzyme preparation for improvement of paper forming strength of alkaline peroxide mechanical pulp (APMP) and application thereof |
| CN104963206A (en) * | 2014-12-11 | 2015-10-07 | 华东理工常熟研究院有限公司 | Enzyme modified paper pulp fiber, wood-plastic composite material and preparation method thereof |
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Application publication date: 20160803 |
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